Centrifugal pump.



A. N. PARNALL. UENTBIFUGAL PUMP.

APPLICATION FILED OUT. 7, 1907. QQEfiQQ, V Fatented n, 19%

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A. N. PARNALL. GENTRIPUGAL PUMP. I

' APPLICATION FILED 00'1. 7,1907. 9121 3624.

" Patentea May 11, 1909.

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PATENT OFFICE.

ALFRED. N. rAnuAL t, or FLORENCE, COLORADO.

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v Specification of Letters Patent. Application-filed October 7-, 1907. Serial No. 396,287.

Patented May 11, 1909.

To all whom itma'y concern:

Be it known that I, ALF-min N. PARN ALL, a citizen of the United States, residing at Florence, in the county of Fremont and State of Colorado, have invented a new and useful Centrifugal Pump, of which the following is a specification.

- ture may bemade without de This invention relates to centrifugal pumps, and has for its principal object to provide an improved construction of pump in which the revoluble piston blades serve to '1 force the Water outward to an annular space between the periphery of the piston and the inner circular wa l of the cylinder, this space being v in free communication with the dischar e.

With this and other objects in View, as will more fully hereinafter appear, the invention consists in certain novel features of construc-' tion and arrangement of parts, hereinafter fully described, illustrated in the accompanymg drawings, and particularly pointed out in the appended claims, it being understood that various changes in the form, pro'por tions, size and minor details of the strucarting from the spirit or sacrificing any 0 thesidvantages of the invention.

In the accompanying drawings :-Figure 1 is a sectional perspective view of a centrifugal pump constructed in accordance with the invention. Fig} 2 is an elevation of the oump with the outer section of the casing de tached. Fig. 3 is a transverse sectional view of the ump.

Sim ar numerals of reference are [employed to indicate corresponding arts throughout the several figures of the raw-..

ings.

Theqpump is mounted on a suitable base a and the cylinder is formed of two main cast-- ings 10 and 11 that are provided with bolting flanges 12, secured together by bolts in the usual manner.

The section 10 of the casing is rovided with supporting feet 13 which are. rmly secured to the foundation, and the central portion of this section 10 is provided with an elongated hub 15 that is bored out to form a bearing for a shaft 16 that may be driven in any suitable manner. The hub is rovided with a suitable stufling box 17 and g and not 4 18 in order to preventleakage of water past the shaft.

Secured to the end of the shaftis a revolu- -ble piston 20 having a plurality of blades 21,

the blades curving outward from the center to the-periphery, and being so. disposed that their convex faces act on volumes of ter or other fluid entering at the center and such fluid will be propelled with great force toward the periphery of the piston, the fluid passing into the annular space 2 that is g formed between the periphery of the piston 1 and the blades. I

n The section 11 of the casing is provided I with a centrally disposed opening 23, forming an inlet for the water, or other fluid, and is, i also, provided with an outlet 24, there being i a bolting flange at the mouth of the outlet to l permit connection with a suitable pipe [through which the Water or other fluid is conveyed to the point oLconsumption. In the section 11 .is formed a partition 26 that divides the inlet from the discharge chamber 27', this discharge chamber being annular in form and communicating with the outlet 24/ The partition 26 is arranged on a curved line extending gradually from the inlet up to a point coincident with the periphery of the piston, so that the water inlet gradually diverges from the inlet endtoward the piston, and there is no obstruction to the flow of the water to the piston. The diameter of the partition 26 is the same asjthe diameter of'the piston,- and' that edge of the partition which faces 27 is curved so as 'to offer minimum resistance to the passage of the water from the annular space of the cylinder over the edge of the partition and down into charge chamber 27.

In practice the water will enter through the opening 23, and will be acted upon by the blades 21, each blade taking its quantity of water or fluid and. independently forcing the sameout. to'the annular space of the cylinder. under a pressure lades to the periphery pf the piston must ,be

carried-around in frictional contact with the the annular dis- As the water reaches this annular space said section,

circular wall of the cylinder until it arrives at the discharge, the discharge being usually in a line tan ential to the iston.

While t e pump has een described as a water pump, it may, of course, be used for pumping liquids of any kind and may be used, also, as a fan or blower for forcing air or other fluid. 1 4 I claim v 1. In a centrifugal pump, a casing consisting of two sections, a piston working .in one of the sections, with the outer ends of the blades spaced'from the inner periphery of whereby an annular space surrounding the wall in the 0t 16! section formingan inlet, said wall being flared at its inner end, and extending up to the outer ends of the piston blades, and said wall forming an annular d ischarge chambe'r concentric to and communiiston is had, and 'an annular eating with the aforesaid annular around the piston, and said discharge cham space her-having an outlet.

2. In a centrifugal pump, a casing consist- I ing of two sections, a piston working in one of the sections in contact at one side with ts end wall, and w th the outer ends of its blades spaced from the inner periphery of said section, whereby an annular space surrounding the iston is had, and an annular wall in the otlier casing section forming an inlet, said wall being flared at its inner end and extending up to the outerends of the piston Blades, and said wall forming an annular discharge chamber concentric to and communicating with the aforesaid annular space around the (piston, the wall of said s ace being curve in the direction of the discharge chamber, and said discharge chamber having'an outlet. I

In testimony that Iclaim the foregoing as my own, I have hereto aflixed my signature in the presence of two witnesses.

ALFRED N. PARNALIJ.

Witnesses:

E. C. FURNIsE, I N. M. PARNALL. 

